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Finding the Fourth Proportional to 2,976.38, 4,462.90 and 1,220.90

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Solution

The fourth proportional to 2,976.38, 4,462.90 and 1,220.90 is: 1,830.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,976.38 : 4,462.90 = 1,220.90 : x
  2. Step 2: Convert to fraction form
    2,976.38/4,462.90 = 1,220.90/x
  3. Step 3: Cross multiply
    2,976.38x = 4,462.90 × 1,220.90
  4. Step 4: Simplify right side
    2,976.38x = 5,448,754.61
  5. Step 5: Solve for x
    x = 5,448,754.61/2,976.38
  6. Step 6: Final answer
    x = 1,830.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.